The OMC-139 is a marine wind display for indication of relative wind speed and direction. This display can read in the information of several wind speed and direction sensors and is standard provided with a NMEA0183 output The OMC-139 is suitable for flush mount and is housed in a standard 144x144 housing. Besides the normal Obsermet front the unit can also be supplied with a black OEM front, called the Black line.